-phe·​none | \fəˈnōn, ˈfēˌnōn\
plural -s

Definition of -phenone 

: aromatic ketone containing a phenyl or substituted phenyl group attached to a (specified) acyl group acetophenone benzophenone resacetophenone

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History and Etymology for -phenone

phen- + -one

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to make faulty or ineffective

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